I have a 2008 Dodge Charger V6, that has been acting weird whenever I have the AC on. The AC seems to cool the inside of the vehicle well, but after a while of driving the vehicle whenever the vehicle is hot, at normal operating temperature, sometimes the car makes a loud humming noise (seems to come from the radiator or condenser) and makes the whole car vibrates really bad, and this is usually at a stopping point and on a hot day above 80degrees. It feels as if the cooling fans are hitting something or are just stuck and not turning, but they are. I cannot figure out what is wrong with it. I have recently replaced the spark plugs and we're torqued to specs. I have also recently gotten the radiator and and cooling fans replacedo as well. I have scanned the vehicle for any stored codes, but no luck, and it does not show any misfires at all.